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Virtual memory combines active RAM and inactive memory on DASD [a] to form a large range of contiguous addresses.. In computing, virtual memory, or virtual storage, [b] is a memory management technique that provides an "idealized abstraction of the storage resources that are actually available on a given machine" [3] which "creates the illusion to users of a very large (main) memory".
Memory virtualization technology follows from memory management architectures and virtual memory techniques. In both fields, the path of innovation has moved from tightly coupled relationships between logical and physical resources to more flexible, abstracted relationships where physical resources are allocated as needed.
A modern computer operating system usually uses virtual memory to provide separate address spaces or separate regions of a single address space, called user space and kernel space. [1] [a] Primarily, this separation serves to provide memory protection and hardware protection from malicious or errant software behaviour.
Virtual memory: giving an app the impression that it has contiguous working memory, isolating it from the underlying physical memory implementation Storage Distributed file system : any file system that allows access to files from multiple hosts sharing via a computer network
VM—Virtual Machine; VM—Virtual Memory; VMM—Virtual Machine Monitor; VNC—Virtual Network Computing; VOD—Video On Demand; VoIP—Voice over Internet Protocol; VPN—Virtual Private Network; VPS—Virtual Private Server; VPU—Visual Processing Unit; VR—Virtual Reality; VRML—Virtual Reality Modeling Language; VSAM—Virtual Storage ...
An internetwork is the connection of multiple different types of computer networks to form a single computer network using higher-layer network protocols and connecting them together using routers. The Internet is the largest example of internetwork. It is a global system of interconnected governmental, academic, corporate, public, and private ...
It is common for the operating system kernel to maintain a table of virtual network interfaces in memory. This may allow the system to store and operate on such information independently of the physical interface involved (or even whether it is a direct physical interface or for instance a tunnel or a bridged interface).
Memory addresses for main memory, memory-mapped I/O, as well as for virtual memory; Device addresses on an expansion bus; Sector addressing for disk drives; File names on a particular volume; Various kinds of network host addresses in computer networks; Uniform resource locators in the Internet.